iStockphoto(CAPE TOWN, South Africa) -- President Obama was treated to an impromptu rap performance Sunday as he toured a classroom at Desmond Tutu’s HIV Foundation Youth Center.

“This is a pretty cool place to be,” the president said, before sitting down and asking two boys what they were working on.

A teenage boy in a hat then showed the president a music program he was working on. “Are you a rapper?” Obama asked.

When the boy said he was, the president asked him to perform for him.

The two “loosened up” before the boy, 15-year-old Aviwe Mtongana, aka “Katmeister,” performed his song, entitled “Hell on Earth.”

“Hell you earth, what people gonna do… on TV, you watching Scooby Doo… saying the punch line, he’s not cool,” he sang, through a thick accent. “Now you face the hardest living… Getting out there is not pimping… The real way is through rapping.”

When the song ended, Obama exclaimed “you gotta drop the mic!” as he motioned for him to do just that.

“I like that. Fantastic,” Obama said, as the boy sat back down.

Asked what it was like to rap for the president, Katmeister told reporters it was “cool.”